The engine was cold at the time. So should I be concerned that I did not use enough? In all the reading I've done, addressing water in mufflers was never covered. After all, all you need to do is drain everything. I took an extra step to add RV.

After sucking up 3 gal of RV, I pulled a exhaust plug and was 100% pink. I cracked the block petcock and also was pink. I pulled the temp sender and RV came out. I pulled the sender to test resistance values.